Heat the broth, black pepper, celery and onion in a 3-quart saucepan over medium-high heat to a boil. Reduce the heat to low. Cover and cook for 5 minutes or until the vegetables are tender, stirring often. Remove the saucepan from the heat. Add the stuffing and mix lightly.
Spoon the stuffing mixture into a greased 3-quart shallow baking dish. Cover the baking dish.
Bake at 350°F for 30 minutes or until the stuffing mixture is hot.